improved swap/MSC-wait scheduling in DPMS-off state

Ilija Hadzic ilijahadzic at
Tue Apr 30 07:31:56 PDT 2013

On Tue, Apr 30, 2013 at 5:16 AM, Michel Dänzer <michel at> wrote:

> On Son, 2013-04-28 at 16:07 -0400, Ilija Hadzic wrote:
> >
> > No new functionality is needed from X-server or any other library
> > except one #define in libdrm which should go into libdrm anyway
> > (it was sent to dri-devel list but has not been merged yet [4]).
> That change needs
> #endif
> or a dependency on a released version of libdrm with the definition.
Yes, I am aware of that. My plan is to get DDX patches reviewed here and,
if they
make sense, send a ping to dri-devel list to ask someone with
push-privileges for libdrm to apply
Imre Deak's patch before I send v2 series of these patches.  The v2 series
will address
any comments I receive here along with a libdrm dependency-bump-up patch.

Defining the constant that is really supposed to come from libdrm in DDX
only be the plan B (e.g., if libdrm push never happens).

> The end result is that regardless in which state the display is, the
> > application sees the events (time and sequence numbers) that progress
> > as if the CRTC is running and the events happen at right time points
> > on the grid determined by the vlbanks (real or interpolated).
> Indeed, looks like DPMS off no longer has any effect on piglit
> results. :) Thanks for working on this.
Forgive me if this question is going to make me look dumb, but given that
is a rendering test suite, the behavior you are seeing is expected. In
other words,
you are not implying that something is wrong, are you?



> --
> Earthling Michel Dänzer           |         
> Libre software enthusiast         |          Debian, X and DRI developer
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